Abstract: Using various embodiments, methods and systems for cooling a data center using recovered thermal energy are described. In one embodiment, a data center cooling system comprises a first channel conveying a cooling fluid received from an outlet of a ventilation system of the computer data center at a first temperature, a second channel conveying the cooling fluid provided into an inlet of the ventilation system to cool the data center at a second temperature, and a heat transfer subsystem (HTS) configured to operate in an organic Rankine cycle (ORC) or a gas compression cycle (GCC) to change the temperature of the cooling fluid from the first temperature to the second temperature. In another embodiment, the system includes a monitoring subsystem monitoring a temperature, pressure, or flow of a working-fluid of the HTS and a controller subsystem to determine whether to operate the HTS in the ORC or GCC modes.

Abstract: Using various embodiments, methods and systems for cooling a data center using recovered thermal energy are described. In one embodiment, a data center cooling system comprises a first channel conveying a cooling fluid received from an outlet of a ventilation system of the computer data center at a first temperature, a second channel conveying the cooling fluid provided into an inlet of the ventilation system to cool the data center at a second temperature, and a heat transfer subsystem (HTS) configured to operate in an organic Rankine cycle (ORC) or a gas compression cycle (GCC) to change the temperature of the cooling fluid from the first temperature to the second temperature. In another embodiment, the system includes a monitoring subsystem monitoring a temperature, pressure, or flow of a working-fluid of the HTS and a controller subsystem to determine whether to operate the HTS in the ORC or GCC modes.

Abstract: A cycle engine. converting thermal energy to electricity includes a cylinder housing having a piston having two oppositely disposed heads and mounted for reciprocating inside the cylinder. The cylinder is disposed between a hot zone to supply hot gas to one piston head and a cold zone to receive discharged hot gas from another piston head, and to transform the discharged hot gas into a liquid. The hot zone supplies hot gas into the first piston head, while the second head discharges hot gas to the cold zone. This action creates a pressure differential between the two piston heads that causes the piston heads to move in one direction. Thereafter, the hot zone supplies hot gas to the second piston head, while the first piston head discharges hot gas to the cold zone, thereby creating pressure differential between the heads causing the piston to move in another direction. The piston is provided with a permanent magnet coupled to electric coil.

Abstract: A method and apparatus for removing oil from the refrigerant in a vapor compression refrigeration system comprising a compressor, a condenser, an evaporator, and a vertical oil separation and heat exchange column into which hot compressed refrigerant vapors containing entrained oil are introduced to flow upwardly countercurrently with cool refrigerant liquid introduced to flow downwardly in direct intimate mutual contact, said column comprising (1) an inlet vapor distributor to disperse vapors throughout the cross section of the column to flow upwardly around baffles and to be removed in the top of the column and be directed to said condenser, (2) an inlet liquid line comprising an hydraulic leg wherein the liquid is of sufficient pressure to resist the pressure of said vapors, (3) a means for distributing said liquid throughout the cross section of said column to fall by gravity to a pool of liquid in the bottom of the column, (4) an outlet from said pool of liquid directed to said evaporator and (5) an outl